{"product_id":"dfb-31-dual-fusion-binocular","title":"[NEW] DFB-31 Gen 2+ Dual Fusion Night Vision Binocular w\/ 640 Thermal \u0026 G24 Mount","description":"\u003ch2\u003eDFB-31 Dual Fusion Night Vision Binocular: Gen 2+ Dual Tube Night Vision with a Built In 640 Thermal Overlay\u003c\/h2\u003e\n\u003cp\u003eTwo eyes under real Gen 2+ night vision, and every warm body in the scene lit up on top of it. The Night Operators DFB-31 is a thermal fusion night vision binocular: a dual tube analog binocular with a 640 x 512 thermal sensor built into the bridge. The thermal picture is laid over your tube image in real time, so a person in the tree line or an animal in tall grass jumps out of the scene while you keep all the detail of the night vision around it. One goggle, one battery pack, nothing to clip on or line up.\u003c\/p\u003e\n\u003cp\u003eIt starts at $8,299.95 with 1400-1550 FOM tubes. US dealer listings for this class of fused thermal binocular sit at $9,875 to $9,999 (read October 2026). Direct from us, made to order, with a real person on email before and after you buy.\u003c\/p\u003e\n\u003ch3\u003eWhat is a fusion night vision binocular?\u003c\/h3\u003e\n\u003cp\u003eA fusion binocular puts two kinds of sight in one view: image intensifier tubes that amplify the little light there is, and a thermal sensor that sees heat. The DFB-31 is a helmet mounted dual tube binocular at 1x magnification with a 40 degree night vision field of view per eye. Between the two pods sits a 640 x 512, 12 micron thermal sensor. Its image is shown on a 1280 x 1024 OLED and blended into the view through the eyepieces with under 30 ms of delay, so what you see stays in step with your head as you move. Switch the thermal layer off and it runs as a plain dual tube night vision binocular for up to 80 hours on one battery pack.\u003c\/p\u003e\n\u003ch3\u003eWhat you see: two thermal fusion modes\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eHighlight\u003c\/th\u003e\n\u003ctd\u003eWarm targets are filled in with colour on top of the night vision image. Fastest way to spot a person or an animal at a glance.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutline\u003c\/th\u003e\n\u003ctd\u003eOnly the edges of warm targets are drawn, so the night vision detail inside and around them stays clear. Best when you need to read the scene, not just find the heat.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNight vision only\u003c\/th\u003e\n\u003ctd\u003eThermal off, both tubes only. Longest runtime.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003ePicture on this page marked illustration shows how the modes look; it is not footage from the unit.\u003c\/p\u003e\n\u003ch3\u003eDFB-31 specifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eNight vision\u003c\/th\u003e\n\u003ctd\u003eTwo Gen 2+ analog image intensifier tubes, 18 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFOM\u003c\/th\u003e\n\u003ctd\u003eFOM1400 \/ FOM1600 \/ FOM1800 \/ FOM2000 (our tiers: 1400-1550, 1600-1800, 1800-1950, 2000-2100)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGain\u003c\/th\u003e\n\u003ctd\u003eAdjustable brightness gain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBright light protection\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNight vision field of view\u003c\/th\u003e\n\u003ctd\u003e40 degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMagnification\u003c\/th\u003e\n\u003ctd\u003e1x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFocus range\u003c\/th\u003e\n\u003ctd\u003e250 mm to infinity, manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThermal resolution\u003c\/th\u003e\n\u003ctd\u003e640 x 512 pixels, 12 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThermal field of view\u003c\/th\u003e\n\u003ctd\u003e24 x 20 degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThermal refresh\u003c\/th\u003e\n\u003ctd\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFusion modes\u003c\/th\u003e\n\u003ctd\u003eHighlight, Outline\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFusion delay\u003c\/th\u003e\n\u003ctd\u003eUnder 30 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eScreen\u003c\/th\u003e\n\u003ctd\u003eOLED, 1280 x 1024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eExit pupil distance\u003c\/th\u003e\n\u003ctd\u003e25 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEye spacing range\u003c\/th\u003e\n\u003ctd\u003e55 to 72 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDiopter\u003c\/th\u003e\n\u003ctd\u003e-4 to +2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompass\u003c\/th\u003e\n\u003ctd\u003eBuilt in digital compass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAuto power off\u003c\/th\u003e\n\u003ctd\u003eEach pod shuts off when flipped up or turned on its side\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003eExternal battery pack, 2 x 18650, on a coiled cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRuntime\u003c\/th\u003e\n\u003ctd\u003eAbout 8 hours with thermal on, about 80 hours night vision only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHelmet interface\u003c\/th\u003e\n\u003ctd\u003eL4 G24 pattern\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions (W x H x D)\u003c\/th\u003e\n\u003ctd\u003e105 x 110 x 87 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e\u0026lt;540 g (no battery)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating temperature\u003c\/th\u003e\n\u003ctd\u003e-40C to +50C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater and dust\u003c\/th\u003e\n\u003ctd\u003eIP67\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eTube FOM tier pricing\u003c\/h3\u003e\n\u003cp\u003eSame four tube tiers as our \u003ca href=\"\/de\/products\/pvs-31-pro-night-vision-binocular\"\u003ePVS-31 PRO\u003c\/a\u003e. Each tier is priced from what its tubes cost us.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFOM tier\u003c\/th\u003e\n\u003cth\u003eUpcharge\u003c\/th\u003e\n\u003cth\u003eTotal price\u003c\/th\u003e\n\u003cth\u003eWho it is for\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1400-1550 FOM (baseline)\u003c\/td\u003e\n\u003ctd\u003e+$0\u003c\/td\u003e\n\u003ctd\u003e$8,299.95\u003c\/td\u003e\n\u003ctd\u003eThermal plus dual tube night vision in one unit at the entry tube tier. The thermal layer does most of the finding; the tubes give you the scene.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1600-1800 FOM (mid)\u003c\/td\u003e\n\u003ctd\u003e+$700\u003c\/td\u003e\n\u003ctd\u003e$8,999.95\u003c\/td\u003e\n\u003ctd\u003eA cleaner tube image on dark, moonless nights. The tier most dealer builds of this goggle start at.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1800-1950 FOM (high)\u003c\/td\u003e\n\u003ctd\u003e+$1,700\u003c\/td\u003e\n\u003ctd\u003e$9,999.95\u003c\/td\u003e\n\u003ctd\u003eThe top of the Gen 2+ range for buyers who spend long nights under the tubes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2000-2100 FOM (premium)\u003c\/td\u003e\n\u003ctd\u003e+$3,400\u003c\/td\u003e\n\u003ctd\u003e$11,699.95\u003c\/td\u003e\n\u003ctd\u003eNot available right now. Shown so you can see the full range.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNight Operators DFB-31 dual tube binocular with the thermal channel built in\u003c\/li\u003e\n\u003cli\u003eExternal battery pack (takes 2 x 18650) with coiled power cable\u003c\/li\u003e\n\u003cli\u003ePadded soft pouch\u003c\/li\u003e\n\u003cli\u003eHard shell carrying case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDFB-31, PVS-31 PRO, or PVS-31 PRO with a clip on thermal?\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003ePVS-31 PRO\u003c\/th\u003e\n\u003cth\u003ePVS-31 PRO + clip on thermal\u003c\/th\u003e\n\u003cth\u003eDFB-31\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePrice at 1600 FOM\u003c\/th\u003e\n\u003ctd\u003e$4,449.95\u003c\/td\u003e\n\u003ctd\u003e$7,449.90\u003c\/td\u003e\n\u003ctd\u003e$8,999.95\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThermal\u003c\/th\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003e640 thermal in front of one tube\u003c\/td\u003e\n\u003ctd\u003e640 thermal built in, fused into the view\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNight vision field of view\u003c\/th\u003e\n\u003ctd\u003e50 degrees\u003c\/td\u003e\n\u003ctd\u003e50 degrees\u003c\/td\u003e\n\u003ctd\u003e40 degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTake the thermal off\u003c\/th\u003e\n\u003ctd\u003eNot needed\u003c\/td\u003e\n\u003ctd\u003eYes, and move it to a PVS-14\u003c\/td\u003e\n\u003ctd\u003eNo, it is part of the goggle (turn it off any time)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePick it if\u003c\/th\u003e\n\u003ctd\u003eYou want the widest view for the money\u003c\/td\u003e\n\u003ctd\u003eYou already own a PVS-31 or PVS-14, or want thermal you can move\u003c\/td\u003e\n\u003ctd\u003eYou want both eyes and thermal in one sealed unit from day one\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAlready own a PVS-31 PRO or PVS-14 from us? The \u003ca href=\"\/de\/products\/adv-coti-clip-on-thermal-imager\"\u003eADV-COTI clip-on thermal\u003c\/a\u003e adds heat to the goggle you have.\u003c\/p\u003e\n\u003ch3\u003eWho the DFB-31 is for\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThe hunter who needs to find the animal first.\u003c\/strong\u003e Heat shows a hog or a coyote in cover long before the tubes alone would, and the night vision around it shows you the ground and the fence line.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe property owner walking the line at night.\u003c\/strong\u003e A warm body near the barn or the fence stands out at a glance, with depth perception on both eyes so you can move while you look.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe search and rescue volunteer.\u003c\/strong\u003e A person on the ground in brush or snow shows as heat while the tubes keep the terrain readable under your feet.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWho should buy something else.\u003c\/strong\u003e If you already own one of our PVS-31 or PVS-14 units, a clip on thermal adds heat to the goggle you have for far less. If you only want thermal, a standalone thermal monocular like our \u003ca href=\"\/de\/products\/predator-thermal-monocular\"\u003ePREDATOR\u003c\/a\u003e is the simpler buy. If you want the widest night vision view, the PVS-31 PRO gives 50 degrees per eye against the DFB-31's 40.\u003c\/p\u003e\n\u003ch3\u003eShipping and lead time\u003c\/h3\u003e\n\u003cp\u003eThe DFB-31 is built to order: your tubes are fitted and the unit is tested after you order. It ships about 5 to 7 weeks from your order date, and the delivery estimate shown on this page before you pay is the one we work to. Ships worldwide. Duty free to the USA: US orders pay no duties or import fees. Outside the USA, any duties or import fees are paid by the buyer. Night vision and thermal devices are regulated: you are responsible for the import, ownership and use laws where you live.\u003c\/p\u003e\n\u003ch3\u003eWarranty and returns\u003c\/h3\u003e\n\u003cp\u003eCancellations within 24 hours of ordering are refunded in full; after that and before it ships, a 10% fee applies. 14 day return window after delivery: defective units reported within 7 days are repaired or replaced at no cost; change of mind returns carry a 30% restocking fee and the buyer pays return postage. 3 month hardware warranty against manufacturing defects. Full terms are on our returns policy page.\u003c\/p\u003e\n\u003ch3\u003eRelated night vision and guides\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/de\/products\/pvs-31-pro-night-vision-binocular\"\u003ePVS-31 PRO Gen 2+ dual tube night vision binocular\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/de\/products\/adv-coti-clip-on-thermal-imager\"\u003eADV-COTI 640 clip-on thermal for PVS-14 and PVS-31\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/de\/products\/predator-thermal-monocular\"\u003ePREDATOR thermal imaging monocular\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/de\/blogs\/guides\/what-is-thermal-fusion\"\u003eWhat is thermal fusion?\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/de\/blogs\/guides\/who-should-buy-dual-tube\"\u003eWho should buy dual tube instead of a monocular\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/de\/blogs\/guides\/thermal-refresh-rate\"\u003eThermal refresh rate: why it matters when you are scanning\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/de\/blogs\/guides\/reading-thermal-signatures\"\u003eReading thermal signatures\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the DFB-31?\u003c\/strong\u003e\u003cbr\u003eA dual tube Gen 2+ analog night vision binocular with a 640 x 512 thermal sensor built in. The thermal image is blended over the night vision image so warm targets stand out while you keep full night vision detail.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this real night vision or digital?\u003c\/strong\u003e\u003cbr\u003eReal analog Gen 2+ image intensifier tubes, one per eye. The thermal layer is digital and sits on top of the tube image.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between Highlight and Outline?\u003c\/strong\u003e\u003cbr\u003eHighlight fills warm targets with colour so they jump out. Outline draws only their edges so you still see the night vision detail on and around them.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long does the battery last?\u003c\/strong\u003e\u003cbr\u003eAbout 8 hours with the thermal layer on and about 80 hours as night vision only, on one external pack that takes two 18650 cells.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it fit my helmet?\u003c\/strong\u003e\u003cbr\u003eThe DFB-31 uses the L4 G24 interface, the same pattern as our PVS-31 PRO mount, which drops into standard helmet shrouds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow heavy is it?\u003c\/strong\u003e\u003cbr\u003eUnder 540 g without the battery pack, which connects by a coiled cable.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thermal sensor does the DFB-31 use?\u003c\/strong\u003e\u003cbr\u003eA 640 x 512 thermal sensor with 12 micron pixels, refreshing at 60 Hz, with a 24 x 20 degree thermal field of view. Its picture is shown on a 1280 x 1024 OLED and blended into the tube view.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the DFB-31 waterproof?\u003c\/strong\u003e\u003cbr\u003eIt is rated IP67 for water and dust, and works from -40C to +50C.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use it without the thermal?\u003c\/strong\u003e\u003cbr\u003eYes. Turn the thermal layer off and it works as a dual tube night vision binocular.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy not just buy a clip on thermal for my PVS-31?\u003c\/strong\u003e\u003cbr\u003eIf you already own one, that is often the better buy, and we sell both. The DFB-31 is for buyers who want both eyes under night vision and thermal built in, with nothing to mount, balance or line up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich FOM tier should I pick?\u003c\/strong\u003e\u003cbr\u003eMost buyers start at 1400-1550: the thermal layer does the finding and the tubes give the scene. Go 1600 or higher if you spend a lot of time under very dark skies with no moon.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long until it ships?\u003c\/strong\u003e\u003cbr\u003eAbout 5 to 7 weeks from your order, because each unit is built to order. The estimate on this page before you pay is the one we work to.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo you ship outside the USA?\u003c\/strong\u003e\u003cbr\u003eYes. The DFB-31 ships worldwide, about 5 to 7 weeks from your order date. Outside the USA, any duties or import fees are paid by the buyer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat if I have a question after I order?\u003c\/strong\u003e\u003cbr\u003eEmail info@nightoperators.com. We reply within one business day.\u003c\/p\u003e","brand":"Night Operators","offers":[{"title":"1400-1550","offer_id":51821084279030,"sku":"DFB31-1400","price":11776.0,"currency_code":"CAD","in_stock":true},{"title":"1600-1800","offer_id":51821084311798,"sku":"DFB31-1600","price":12769.0,"currency_code":"CAD","in_stock":true},{"title":"1800-1950","offer_id":51821084344566,"sku":"DFB31-1800","price":14188.0,"currency_code":"CAD","in_stock":true},{"title":"2000-2100","offer_id":51821084377334,"sku":"DFB31-2000","price":16600.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/8335\/2822\/files\/dfb-31-t1-three-quarter-front_f646072a-150d-4087-9a28-84e2c321d288.webp?v=1791947780","url":"https:\/\/nightoperators.com\/de\/products\/dfb-31-dual-fusion-binocular","provider":"Night Operators","version":"1.0","type":"link"}